/* fashion-visual-showcase-180502/frontend/public/style.css */

/* 1. Variables & Reset */
:root {
    --bg-color: #fcfcfc;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-color: #a8a8a8;
    --border-color: #e5e5e5;
    
    --font-primary: 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif; /* 用于诗意文字 */

    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --transition-base: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: all 0.8s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    opacity: 0;
    animation: fadeInPage 1s ease-out forwards;
}

/* 2. Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.5rem; margin-bottom: var(--spacing-sm); }
p { color: var(--text-secondary); margin-bottom: var(--spacing-sm); font-weight: 300; }

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

img {
    display: block;
    max-width: 100%;
    height: auto;
    object-fit: cover;
}

ul { list-style: none; }

/* 3. Layout Utilities */
.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.text-center { text-align: center; }
.fade-in { animation: fadeIn 1s ease-out forwards; }

/* 4. Navigation */
header {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(252, 252, 252, 0.95);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid transparent;
    transition: var(--transition-base);
}

header.scrolled {
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

nav ul {
    display: flex;
    gap: var(--spacing-md);
}

nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding-bottom: 4px;
}

nav a:hover, nav a.active {
    color: var(--text-primary);
    transform: scale(1.05);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-primary);
    transition: var(--transition-base);
}

nav a:hover::after, nav a.active::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* 5. Home: Hero Slider */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    z-index: 1;
}

.hero-slide.active {
    opacity: 1;
    z-index: 2;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    text-align: center;
    color: #fff;
    width: 80%;
}

.hero-text {
    font-size: 3.5rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    opacity: 0;
    transform: translateY(20px);
    transition: all 1s ease-out 0.5s;
}

.hero-slide.active .hero-text {
    opacity: 1;
    transform: translateY(0);
}

.slider-indicators {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 4;
    display: flex;
    gap: 12px;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition-base);
}

.indicator.active {
    background: #fff;
    transform: scale(1.2);
}

/* 6. Home: Category Cards */
.categories {
    padding: var(--spacing-lg) 5%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.category-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-base);
    display: block;
}

.card-image-wrapper {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.card-image-wrapper img {
    width: 100%;
    height: 100%;
    transition: var(--transition-slow);
}

.category-content {
    padding-top: var(--spacing-sm);
    text-align: center;
}

.category-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

.category-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.category-card:hover {
    transform: translateY(-10px);
}

.category-card:hover .card-image-wrapper img {
    transform: scale(1.05);
}

/* 7. Story Page */
.page-header {
    padding: 160px 0 80px;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-family: var(--font-serif);
    font-style: italic;
}

.story-section {
    display: flex;
    min-height: 80vh;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.story-section:nth-child(even) {
    flex-direction: row-reverse;
}

.story-img, .story-text {
    flex: 1;
    width: 50%;
}

.story-img {
    height: 80vh;
    overflow: hidden;
}

.story-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.story-text {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.story-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.story-text p {
    margin-bottom: var(--spacing-sm);
    max-width: 500px;
    line-height: 1.8;
}

/* 8. Collections Page */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.tab {
    cursor: pointer;
    padding: 8px 16px;
    border: 1px solid transparent;
    transition: var(--transition-base);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.tab:hover, .tab.active {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.collection-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    padding: 0 5%;
}

.grid-item {
    position: relative;
    aspect-ratio: 4/5;
    overflow: hidden;
}

.grid-item img {
    width: 100%;
    height: 100%;
    transition: var(--transition-base);
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

.overlay h4 {
    color: #fff;
    font-weight: 300;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    transform: translateY(20px);
    transition: var(--transition-base);
}

.grid-item:hover img {
    transform: scale(1.05);
}

.grid-item:hover .overlay {
    opacity: 1;
}

.grid-item:hover .overlay h4 {
    transform: translateY(0);
}

.narrative-text {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    text-align: justify;
}

.narrative-col p {
    font-size: 0.85rem;
    line-height: 1.8;
}

/* 9. Details Page */
.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    padding: 0 5% var(--spacing-xl);
}

.detail-item {
    position: relative;
    overflow: hidden;
}

.detail-item img {
    width: 100%;
    aspect-ratio: 16/9;
}

.detail-info {
    padding: var(--spacing-sm) 0;
}

.detail-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.micro-details {
    padding: 0 5% var(--spacing-xl);
}

.micro-row {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-lg);
}

.micro-row:nth-child(even) {
    flex-direction: row-reverse;
}

.micro-img {
    flex: 1;
    overflow: hidden;
    position: relative;
    cursor: zoom-in;
}

.micro-img img {
    transition: transform 0.5s ease;
}

.micro-img:hover img {
    transform: scale(1.5);
}

.micro-text {
    flex: 1;
}

.micro-text h3 {
    margin-bottom: var(--spacing-sm);
}

/* 10. Footer */
footer {
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    background-color: var(--bg-color);
}

footer p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 11. Animations */
@keyframes fadeInPage {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 12. Responsive Design */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    .hero-text { font-size: 2.5rem; }
    
    .categories {
        grid-template-columns: repeat(2, 1fr); /* Tablet: 2 columns */
    }
    .categories .category-card:last-child {
        grid-column: span 2; /* Center last card */
        width: 50%;
        margin: 0 auto;
    }

    .collection-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .narrative-text {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 4rem;
    }

    header {
        padding: 0 var(--spacing-sm);
        height: 60px;
    }

    .menu-toggle {
        display: block;
        z-index: 1001;
    }

    nav ul {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease;
        box-shadow: -5px 0 15px rgba(0,0,0,0.05);
    }

    nav ul.open {
        right: 0;
    }

    .hero-text {
        font-size: 2rem;
    }

    .categories {
        grid-template-columns: 1fr;
    }
    .categories .category-card:last-child {
        grid-column: span 1;
        width: 100%;
    }

    .story-section, .story-section:nth-child(even) {
        flex-direction: column;
    }
    
    .story-img, .story-text {
        width: 100%;
    }
    
    .story-img {
        height: 50vh;
    }

    .collection-grid {
        grid-template-columns: 1fr;
    }

    .details-grid {
        grid-template-columns: 1fr;
    }

    .micro-row, .micro-row:nth-child(even) {
        flex-direction: column;
    }
}